Measurement Computing USB-1608FS - Manual (Page 23)

USB-1608FS User's Guide
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Power
Table 11. Power specifications
Parameter Condition Specification
Supply current USB enumeration < 100 mA
Supply current (Note 3) Continuous mode 150 mA
PC +5 V voltage range (Note 4)  Connected to self-powered hub
 Connected to externally-powered root port hub
4.25 V min, 5.25 V max
PC +5V output current (Note 5) 300 mA max
Note 3: This is the total current requirement for the USB-1608FS which includes up to 10 mA for the status
LED.
Note 4: "Self-powered hub" refers to a USB hub with an external power supply. Self-powered hubs allow a
connected USB device to draw up to 500 mA. "Root port hubs" reside in the PC USB host Controller.
The USB port(s) on your PC are root port hubs. All externally-powered root port hubs, such as a
desktop PC, provide up to 500 mA of current for a USB device. Battery-powered root port hubs
provide 100 mA or 500 mA, depending upon the manufacturer. A laptop PC that is not connected to an
external power adapter is an example of a battery-powered root port hub. If your laptop PC is
constrained to the 100 mA maximum, you need to purchase a self-powered hub.
Note 5: This refers to the total amount of current that can be sourced from the USB +5 V and digital outputs.
General
Table 12. General specifications
Parameter Specification
Device type USB 2.0 (full-speed)
Device compatibility USB 1.1, USB 2.0
Environmental
Table 13. Environmental specifications
Parameter Specification
Operating temperature range 0 °C to 70 °C
Storage temperature range –40 °C to 70 °C
Humidity 0% to 90% non-condensing
Mechanical
Table 14. Mechanical specifications
Parameter Specification
Dimensions (L × W × H) 3.10 × 3.20 × 1.05 in. (79 × 82 × 27 mm)
USB cable length 3 m (9.84 ft) max
User connection length 3 m (9.84 ft) max
Screw terminal connector and pinout
Table 15. Connector specifications
Parameter Specification
Connector type Screw terminal
Wire gauge range 16 AWG to 30 AWG